Datasheet

March 2009 SNAU028A 25
4. Step 4: Select Reference – click on the “VREF MUX” block to choose “VREF_SEL = 0:
VREF1”. Make sure the value for VREF1 = 4.1V.
5. Step 5: Set Gain – click on the “FGA” block, “PGA” block, or the “Gain” slider to select
the gain. The gain can be set to 1 in this example.
6. Step 6: Set Buffer – click on the “ B U F F” block to include or exclude the buffer from the
signal path. The buffer can be excluded from the signal path in this example.
7. Step 7: Set Calibration - click on the “No Calibration” block to enable or disable calibration.
Refer to the LMP90100 datasheet to more information on the LMP90100’s background
calibration types and modes. The calibration can be OFF for this example.
8. Step 8: Int/Ext CLK? – click on the “CLK MUX” block and make sure the internal clock is
selected.
9. Step 9: Performance - click on the “Performance” mini-tab. This tab displays the Estimated
Device Performance base on the block diagram that you’ve configured, as well as the
Measured System Performance if you’ve connected a board and ran the LMP90100.
H. Configuring the LMP90100 for the Thermocouple Using the Sensor AFE Software
Follow the step-by-step instructions under the “HelpBar” mini-tab (left hand side of the GUI) to
configure the LMP90100 for the thermocouple. These step-by-step instructions are discussed in
details below, and the recommended configuration should look similar to the figure below.